ABOUT PASADENA – Pasadena, CA. Pasadena is a city in Los Angeles County, California, United States, located 10 miles northeast of Downtown Los Angeles. The estimated population of Pasadena was 142,647 in 2017, making it the 183rd-largest city in the United States. Pasadena is the ninth-largest city in Los Angeles County. Pasadena was incorporated on June 19, 1886, becoming one of the first cities to be incorporated in what is now Los Angeles County, following the city of Los Angeles . It is one of the primary cultural centers of the San Gabriel Valley.The city is known for hosting the annual Rose Bowl football game and Tournament of Roses Parade. In addition, Pasadena is also home to many scientific and cultural institutions, including Caltech, Pasadena City College, Fuller Theological Seminary, ArtCenter College of Design, the Pasadena Playhouse, the Ambassador Auditorium, the Norton Simon Museum, and the USC Pacific Asia Museum.